Confidence Intervals Flashcards
1
Q
What is a confidence interval?
A
A range where we expect the true mean to be within a certain confidence
2
Q
Why is the standard for confidence intervals 95?
A
Convenience
3
Q
What is the known sampling distribution of the mean?
A
T-test with n-1 degrees of freedom
4
Q
Confidence intervals are always integers true/false
A
True
5
Q
Which values does Pearson’s correlation coefficient lie between?
A
-1 and 1
6
Q
Give a basic way to calculate confidence interval of proportion
A
(no. successes / sample size)
7
Q
When is bootstrapping used?
A
Distribution of the estimator is complicated or unknown
For power calculations
